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SLUDGE DEWATERING PILOT FOR PET FOOD FACTORY

Dewatering Screw Press (DSP)

Food and Beverage

New South Wales

BACKGROUND

A pet food processing plant in Western Sydney wanted to reduce the high disposal costs for its Dissolved Air Flotation (DAF) sludge. Following a technical review of different sludge dewatering processes, a Dewatering Screw Press (DSP) was identified as the best solution for this application.

MAK Water was selected to provide a pilot sludge dewatering plant to trial a dewatering screw press over a 2-week period as proof of concept.

SOLUTION

Dewatering Screw Press (DSP) with integrated flocculation tank and polymer dosing treating DAF sludge with an average concentration of 8% dry solids (DS) / 80,000 mg/L.

MAK Water KEY SOLUTIONS

  • Plug and play compact sludge dewatering equipment with small footprint
  • Set-up and commissioning assistance provided to optimise plant settings and performance
  • Optimised polymer selection and dosage rate for site specific sludge
  • Quick delivery to enable immediate trialling

RESULTS AND BENEFITS

  • Pilot plant success. Dewatered cake with up to 85% DS content achieved
  • Pressate with low solids content. DSP pressate demonstrated solids recovery of >99%
  • Polymer optimisation. Specialist polymer knowledge provided polymer optimisation for maximum DS cake with polymer consumption rate of 2-4 g/kg
  • Reduced operating cost. Sludge disposal cost eliminated as cake is rendered down for product
  • CAPEX Approved. Pilot demonstrated business case for approval of permanent full-scale dewatering screw press plant